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Diodes Incorporated AL1676-20CS7-13
- Part No.:
- AL1676-20CS7-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AL1676-20CS7-13.pdf
- Description:
- IC LED DRIVER OFFL 2A 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,064
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Product details
Overview
AL1676-20CS7-13 from Diodes Incorporated is a universal AC-input (85–277 VAC), high-power-factor (PF >0.9), boundary-conduction-mode (BCM) Buck LED driver IC with integrated 600 V/2.0 A high-voltage MOSFET, ±3% constant current regulation, and thermal foldback protection. It delivers up to 10 W output power in retrofit LED lamps and tube lighting using a single-winding inductor and SO-7 package.
For engineers reviewing the AL1676-20CS7-13 datasheet, AL1676-20CS7-13 pinout, AL1676-20CS7-13 application, or AL1676-20CS7-13 equivalent, this device supports design of compact, low-BOM-cost, EMI-friendly LED drivers requiring stable CC output, wide input range, and robust fault management including OVP, OSP, OTP, and cycle-by-cycle OCP.
Technical Context
The AL1676-20CS7-13 implements constant-on-time (COT) control to achieve high power factor (>0.9) without auxiliary winding, using source-driver architecture for ultra-low operating current (170 µA at 5 kHz). Its BCM operation eliminates fixed-frequency EMI peaks and simplifies filter design.
Internal protections include leading-edge blanking (tON_MIN = 550 ns), tOFF-based zero-current detection (ZCD), and dual-stage thermal management: linear thermal foldback (TREG = +150 °C) followed by latched OTP shutdown (+170 °C). The ROVP pin sets output open voltage via external resistor; COMP pin enables loop compensation for tight line/load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–277 VAC universal; enables single-design compatibility across global mains without hardware change. |
| Integrated MOSFET | 600 V VDS, 2.0 A ID, 5.5 Ω RDS(ON); supports ≤10 W LED loads at 20 V min output with SO-7 thermal limits. |
| Constant Current Accuracy | ±3% tolerance; achieved via 0.400 V internal VREF and precision current-sense amplifier (Gm = 25 µA/V). |
| Startup & Operating Current | 100 µA start-up current; 170 µA operating current at 5 kHz; reduces standby losses and enables high-efficiency designs. |
| Thermal Protection | Linear thermal foldback from +150 °C (reduces IOUT proportionally); latched OTP shutdown at +170 °C for fail-safe operation. |
| Protection Functions | UVLO (14.5 V start / 8.5 V hold), cycle-by-cycle OCP, ROVP-based OVP, OSP (5 kHz fallback), LEB, and VCS clamp (0.8 V). |
| Package | SO-7; 123 °C/W θJA on 1"×1" FR-4; supports surface-mount assembly and moderate power dissipation (0.8 W max @ TA = 50 °C). |
Pinout & Package
AL1676-20CS7-13 is housed in a 7-pin SOIC variant (SO-7) with exposed pad for thermal enhancement. Pin 6 is NC; Pin 7 is the drain terminal of the integrated 600 V MOSFET.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | IC supply input | Accepts 8.5–15.5 V; clamped internally; powers gate driver and logic; startup sourced from high-voltage resistors. |
| 2 ROVP | Output overvoltage reference | Sets LED open-circuit voltage via external resistor; referenced to 0.5 V internal VROVP_REF. |
| 3 COMP | Error amplifier output | Drives external RC compensation network to stabilize constant-current loop and improve transient response. |
| 4 GND | Power and signal ground | Common return for VCC, CS, ROVP, and internal circuitry; must be low-impedance for noise immunity. |
| 5 CS | Current sense input | Monitors MOSFET source current via R5; triggers OCP when VCS ≥ 0.8 V; includes LEB (550 ns). |
| 6 NC | No connection | Unbonded pin; must remain floating; no PCB trace or solder mask opening required. |
| 7 D | High-voltage MOSFET drain | Connects directly to rectified AC input or bulk capacitor; rated 600 V; handles full line-referenced switching stress. |
Key Features
| Feature | Design Value |
|---|---|
| Single-winding inductor topology | Eliminates auxiliary winding and associated components, reducing BOM count and board area while enabling BCM operation. |
| Source-driver architecture | Lowers operating current to 170 µA at 5 kHz, minimizing VCC loss and improving system efficiency at light load. |
| Boundary conduction mode (BCM) | Ensures natural zero-current switching, easing EMI compliance and eliminating audible noise in lighting applications. |
| Tight ±3% CC regulation | Guaranteed over line (85–277 VAC), load, and temperature (−40 to +105 °C ambient) without external trimming. |
| Comprehensive fault coverage | Five independent protections-UVLO, OCP, OVP/OSP, OTP, and thermal foldback-enable Class II, non-isolated lamp designs. |
Applications
| Retrofit LED Lamps | LED Tube Lighting |
|---|---|
|
Use Scenario: Replacement of incandescent or CFL bulbs in E26/E27 sockets with integrated LED modules. IC Role / Device Role / Timing Role: Primary constant-current controller managing buck conversion from rectified AC, regulating LED string current with BCM timing. Use Value: Enables compact, thermally constrained designs with <10 W output, ±3% current stability, and automatic thermal derating above +150 °C junction. |
Use Scenario: Linear LED tube replacement for fluorescent fixtures (T8/T5), operating directly from AC mains. IC Role / Device Role / Timing Role: Universal-input Buck driver providing regulated CC output; uses ZCD-based tOFF detection for accurate BCM timing without auxiliary winding. Use Value: Reduces component count vs. flyback solutions; achieves >90% efficiency and PF >0.9 while meeting IEC 61000-3-2 Class C harmonic limits. |
| High-Voltage DC-DC LED Driver | General-Purpose Constant Current Source |
|
Use Scenario: Industrial signage or architectural lighting powered from 277 VAC high-line commercial systems. IC Role / Device Role / Timing Role: High-VDS (600 V) Buck controller handling elevated input stress; manages tON/tOFF within 550 ns–29 µs / 6–180 µs windows. Use Value: Eliminates need for external HV MOSFET and driver; supports direct 277 VAC operation with built-in OVP/OSP for open/shorted LED string resilience. |
Use Scenario: Non-lighting applications requiring precise, programmable constant current (e.g., laser diode bias, sensor excitation). IC Role / Device Role / Timing Role: Adjustable CC source using R5 for current setting and ROVP for voltage limiting; operates in BCM for low-noise output. Use Value: Delivers ±3% current accuracy over temperature with integrated protection-no external supervisor IC needed for basic fault coverage. |
Availability
AL1676-20CS7-13 is available at Aetrix Electronics and suitable for retrofit LED lamps, LED tube lighting, and high-voltage DC-DC LED drivers requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for AL1676-20CS7-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AL1676 belongs to Diodes' high-efficiency LED driver product line, designed specifically for cost-sensitive, non-isolated, universal-input LED lighting systems requiring high PF, low BOM count, and robust thermal/fault resilience.
FAQ
What is the maximum continuous output power supported by AL1676-20CS7-13?
The AL1676-20CS7-13 supports up to 10 W output power, limited by its integrated 600 V/2.0 A MOSFET and SO-7 package thermal capability (0.8 W max power dissipation at TA = 50 °C). At minimum 20 V output voltage and 200 mA current, it maintains ±3% regulation across 85–277 VAC input and −40 to +105 °C ambient.
How does the AL1676-20CS7-13 achieve high power factor without an auxiliary winding?
It uses constant-on-time (COT) control with source-driver architecture and novel tOFF detection directly from the D pin, eliminating the need for an auxiliary winding. This enables natural boundary conduction mode (BCM) operation, achieving PF >0.9 across universal input range while reducing component count and EMI filter complexity.
Can AL1676-20CS7-13 drive LEDs with output voltages below 20 V?
No-Diodes specifies 20 V as the minimum recommended output voltage due to leading-edge blanking (LEB) timing constraints and tON_MIN (550 ns) limitations. Attempting lower output voltages risks incorrect current regulation, unstable BCM operation, and potential OCP misfire during startup or transients.
What is the difference between thermal foldback and over-temperature protection in AL1676-20CS7-13?
Thermal foldback begins at +150 °C (typical), linearly reducing output current to limit power dissipation and prevent thermal runaway. Over-temperature protection triggers at +170 °C (typical), causing latched shutdown-operation resumes only after full power cycle. Foldback enables graceful derating; OTP provides irreversible safety cutoff.
AL1676-20CS7-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8.5V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- 600V
- Current - Output / Channel:
- 2A
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-SO
AL1676-20CS7-13 FAQ
1.How can I place an order for AL1676-20CS7-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL1676-20CS7-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AL1676-20CS7-13 reliable?
The price and inventory of AL1676-20CS7-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL1676-20CS7-13 is usually 5 days.
3.What payment methods are accepted for AL1676-20CS7-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL1676-20CS7-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL1676-20CS7-13?
AL1676-20CS7-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL1676-20CS7-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AL1676-20CS7-13?
For technical support, including AL1676-20CS7-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL1676-20CS7-13 requirements.
6.How does Aetrix verify that AL1676-20CS7-13 is sourced from the original manufacturer or authorized distributors?
All AL1676-20CS7-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AL1676-20CS7-13 meets industry standards.
7.What is the process for return or replacement of AL1676-20CS7-13?
All AL1676-20CS7-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL1676-20CS7-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AL1676-20CS7-13 part is unused and in its original packaging.
Return procedure for AL1676-20CS7-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AL1676-20CS7-13 Tags
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